doc: downgrade macOS x64 to Tier 2

Signed-off-by: Antoine du Hamel <duhamelantoine1995@gmail.com>
PR-URL: #63055
Backport-PR-URL: #63153
Refs: https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment/
Refs: nodejs/build#4317
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: René <contact.9a5d6388@renegade334.me.uk>
Reviewed-By: Stewart X Addison <sxa@redhat.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: aduh95

BUILDING.md

@@ -117,7 +117,7 @@ platforms. This is true regardless of entries in the table below.
 | GNU/Linux | riscv64 | kernel >= 5.19, glibc >= 2.36 | Experimental | GCC >= 14 or Clang >= 19 for native builds[^7]|
 | Windows | x64 | >= Windows 10/Server 2016 | Tier 1 |[^2],[^3]|
 | Windows | arm64 | >= Windows 10 | Tier 2 ||
-| macOS | x64 | >= 13.5 | Tier 1| For notes about compilation see [^4]|
+| macOS | x64 | >= 13.5 | Tier 2| For notes about compilation see [^4]|
 | macOS | arm64 | >= 13.5 | Tier 1 ||
 | SmartOS | x64 | >= 18 | Tier 2 ||
 | AIX | ppc64be >=power9 | >= 7.2 TL04 | Tier 2 ||